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-rw-r--r--src/arch/sparc/remote_gdb.cc456
-rw-r--r--src/arch/sparc/remote_gdb.hh129
2 files changed, 585 insertions, 0 deletions
diff --git a/src/arch/sparc/remote_gdb.cc b/src/arch/sparc/remote_gdb.cc
new file mode 100644
index 000000000..2e662af7f
--- /dev/null
+++ b/src/arch/sparc/remote_gdb.cc
@@ -0,0 +1,456 @@
+/*
+ * Copyright (c) 2002-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Nathan Binkert
+ */
+
+/*
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Lawrence Berkeley Laboratories.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
+ */
+
+/*-
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
+ *
+ * Taken from NetBSD
+ *
+ * "Stub" to allow remote cpu to debug over a serial line using gdb.
+ */
+
+#include <sys/signal.h>
+
+#include <string>
+#include <unistd.h>
+
+#include "arch/vtophys.hh"
+#include "arch/sparc/remote_gdb.hh"
+#include "base/intmath.hh"
+#include "base/kgdb.h"
+#include "base/remote_gdb.hh"
+#include "base/socket.hh"
+#include "base/trace.hh"
+#include "config/full_system.hh"
+#include "cpu/thread_context.hh"
+#include "cpu/static_inst.hh"
+#include "mem/physical.hh"
+#include "mem/port.hh"
+#include "sim/system.hh"
+
+using namespace std;
+using namespace TheISA;
+
+RemoteGDB::Event::Event(RemoteGDB *g, int fd, int e)
+ : PollEvent(fd, e), gdb(g)
+{}
+
+void
+RemoteGDB::Event::process(int revent)
+{
+ if (revent & POLLIN)
+ gdb->trap(ALPHA_KENTRY_IF);
+ else if (revent & POLLNVAL)
+ gdb->detach();
+}
+
+RemoteGDB::RemoteGDB(System *_system, ThreadContext *c)
+ : BaseRemoteGDB(_system, c, KGDB_NUMREGS),
+ event(NULL)
+{}
+
+RemoteGDB::~RemoteGDB()
+{
+ if (event)
+ delete event;
+}
+
+///////////////////////////////////////////////////////////
+// RemoteGDB::acc
+//
+// Determine if the mapping at va..(va+len) is valid.
+//
+bool
+RemoteGDB::acc(Addr va, size_t len)
+{
+ Addr last_va;
+
+ va = TheISA::TruncPage(va);
+ last_va = TheISA::RoundPage(va + len);
+
+ do {
+ if (TheISA::IsK0Seg(va)) {
+ if (va < (TheISA::K0SegBase + pmem->size())) {
+ DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= "
+ "%#x < K0SEG + size\n", va);
+ return true;
+ } else {
+ DPRINTF(GDBAcc, "acc: Mapping invalid %#x > K0SEG + size\n",
+ va);
+ return false;
+ }
+ }
+
+ /**
+ * This code says that all accesses to palcode (instruction and data)
+ * are valid since there isn't a va->pa mapping because palcode is
+ * accessed physically. At some point this should probably be cleaned up
+ * but there is no easy way to do it.
+ */
+
+ if (AlphaISA::PcPAL(va) || va < 0x10000)
+ return true;
+
+ Addr ptbr = context->readMiscReg(AlphaISA::IPR_PALtemp20);
+ TheISA::PageTableEntry pte = TheISA::kernel_pte_lookup(context->getPhysPort(), ptbr, va);
+ if (!pte.valid()) {
+ DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va);
+ return false;
+ }
+ va += TheISA::PageBytes;
+ } while (va < last_va);
+
+ DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va);
+ return true;
+}
+
+///////////////////////////////////////////////////////////
+// RemoteGDB::signal
+//
+// Translate a trap number into a Unix-compatible signal number.
+// (GDB only understands Unix signal numbers.)
+//
+int
+RemoteGDB::signal(int type)
+{
+ switch (type) {
+ case ALPHA_KENTRY_INT:
+ return (SIGTRAP);
+
+ case ALPHA_KENTRY_UNA:
+ return (SIGBUS);
+
+ case ALPHA_KENTRY_ARITH:
+ return (SIGFPE);
+
+ case ALPHA_KENTRY_IF:
+ return (SIGILL);
+
+ case ALPHA_KENTRY_MM:
+ return (SIGSEGV);
+
+ default:
+ panic("unknown signal type");
+ return 0;
+ }
+}
+
+///////////////////////////////////////////////////////////
+// RemoteGDB::getregs
+//
+// Translate the kernel debugger register format into
+// the GDB register format.
+void
+RemoteGDB::getregs()
+{
+ memset(gdbregs.regs, 0, gdbregs.size);
+
+ gdbregs.regs[KGDB_REG_PC] = context->readPC();
+
+ // @todo: Currently this is very Alpha specific.
+ if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) {
+ for (int i = 0; i < TheISA::NumIntArchRegs; ++i) {
+ gdbregs.regs[i] = context->readIntReg(AlphaISA::reg_redir[i]);
+ }
+ } else {
+ for (int i = 0; i < TheISA::NumIntArchRegs; ++i) {
+ gdbregs.regs[i] = context->readIntReg(i);
+ }
+ }
+
+#ifdef KGDB_FP_REGS
+ for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) {
+ gdbregs.regs[i + KGDB_REG_F0] = context->readFloatRegBits(i);
+ }
+#endif
+}
+
+///////////////////////////////////////////////////////////
+// RemoteGDB::setregs
+//
+// Translate the GDB register format into the kernel
+// debugger register format.
+//
+void
+RemoteGDB::setregs()
+{
+ // @todo: Currently this is very Alpha specific.
+ if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) {
+ for (int i = 0; i < TheISA::NumIntArchRegs; ++i) {
+ context->setIntReg(AlphaISA::reg_redir[i], gdbregs.regs[i]);
+ }
+ } else {
+ for (int i = 0; i < TheISA::NumIntArchRegs; ++i) {
+ context->setIntReg(i, gdbregs.regs[i]);
+ }
+ }
+
+#ifdef KGDB_FP_REGS
+ for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) {
+ context->setFloatRegBits(i, gdbregs.regs[i + KGDB_REG_F0]);
+ }
+#endif
+ context->setPC(gdbregs.regs[KGDB_REG_PC]);
+}
+
+void
+RemoteGDB::setTempBreakpoint(TempBreakpoint &bkpt, Addr addr)
+{
+ DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", addr);
+
+ bkpt.address = addr;
+ insertHardBreak(addr, 4);
+}
+
+void
+RemoteGDB::clearTempBreakpoint(TempBreakpoint &bkpt)
+{
+ DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n",
+ bkpt.address);
+
+
+ removeHardBreak(bkpt.address, 4);
+ bkpt.address = 0;
+}
+
+void
+RemoteGDB::clearSingleStep()
+{
+ DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n",
+ takenBkpt.address, notTakenBkpt.address);
+
+ if (takenBkpt.address != 0)
+ clearTempBreakpoint(takenBkpt);
+
+ if (notTakenBkpt.address != 0)
+ clearTempBreakpoint(notTakenBkpt);
+}
+
+void
+RemoteGDB::setSingleStep()
+{
+ Addr pc = context->readPC();
+ Addr npc, bpc;
+ bool set_bt = false;
+
+ npc = pc + sizeof(MachInst);
+
+ // User was stopped at pc, e.g. the instruction at pc was not
+ // executed.
+ MachInst inst = read<MachInst>(pc);
+ StaticInstPtr si(inst);
+ if (si->hasBranchTarget(pc, context, bpc)) {
+ // Don't bother setting a breakpoint on the taken branch if it
+ // is the same as the next pc
+ if (bpc != npc)
+ set_bt = true;
+ }
+
+ DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n",
+ takenBkpt.address, notTakenBkpt.address);
+
+ setTempBreakpoint(notTakenBkpt, npc);
+
+ if (set_bt)
+ setTempBreakpoint(takenBkpt, bpc);
+}
+
+// Write bytes to kernel address space for debugger.
+bool
+RemoteGDB::write(Addr vaddr, size_t size, const char *data)
+{
+ if (BaseRemoteGDB::write(vaddr, size, data)) {
+#ifdef IMB
+ alpha_pal_imb();
+#endif
+ return true;
+ } else {
+ return false;
+ }
+}
+
+
+PCEventQueue *RemoteGDB::getPcEventQueue()
+{
+ return &system->pcEventQueue;
+}
+
+
+RemoteGDB::HardBreakpoint::HardBreakpoint(RemoteGDB *_gdb, Addr pc)
+ : PCEvent(_gdb->getPcEventQueue(), "HardBreakpoint Event", pc),
+ gdb(_gdb), refcount(0)
+{
+ DPRINTF(GDBMisc, "creating hardware breakpoint at %#x\n", evpc);
+}
+
+void
+RemoteGDB::HardBreakpoint::process(ThreadContext *tc)
+{
+ DPRINTF(GDBMisc, "handling hardware breakpoint at %#x\n", pc());
+
+ if (tc == gdb->context)
+ gdb->trap(ALPHA_KENTRY_INT);
+}
+
+bool
+RemoteGDB::insertSoftBreak(Addr addr, size_t len)
+{
+ if (len != sizeof(MachInst))
+ panic("invalid length\n");
+
+ return insertHardBreak(addr, len);
+}
+
+bool
+RemoteGDB::removeSoftBreak(Addr addr, size_t len)
+{
+ if (len != sizeof(MachInst))
+ panic("invalid length\n");
+
+ return removeHardBreak(addr, len);
+}
+
+bool
+RemoteGDB::insertHardBreak(Addr addr, size_t len)
+{
+ if (len != sizeof(MachInst))
+ panic("invalid length\n");
+
+ DPRINTF(GDBMisc, "inserting hardware breakpoint at %#x\n", addr);
+
+ HardBreakpoint *&bkpt = hardBreakMap[addr];
+ if (bkpt == 0)
+ bkpt = new HardBreakpoint(this, addr);
+
+ bkpt->refcount++;
+
+ return true;
+}
+
+bool
+RemoteGDB::removeHardBreak(Addr addr, size_t len)
+{
+ if (len != sizeof(MachInst))
+ panic("invalid length\n");
+
+ DPRINTF(GDBMisc, "removing hardware breakpoint at %#x\n", addr);
+
+ break_iter_t i = hardBreakMap.find(addr);
+ if (i == hardBreakMap.end())
+ return false;
+
+ HardBreakpoint *hbp = (*i).second;
+ if (--hbp->refcount == 0) {
+ delete hbp;
+ hardBreakMap.erase(i);
+ }
+
+ return true;
+}
diff --git a/src/arch/sparc/remote_gdb.hh b/src/arch/sparc/remote_gdb.hh
new file mode 100644
index 000000000..6ac4f296f
--- /dev/null
+++ b/src/arch/sparc/remote_gdb.hh
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2002-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Nathan Binkert
+ */
+
+#ifndef __ARCH_ALPHA_REMOTE_GDB_HH__
+#define __ARCH_ALPHA_REMOTE_GDB_HH__
+
+#include <map>
+
+#include "arch/types.hh"
+#include "base/remote_gdb.hh"
+#include "cpu/pc_event.hh"
+#include "base/pollevent.hh"
+
+class System;
+class ThreadContext;
+class PhysicalMemory;
+
+namespace SparcISA
+{
+ class RemoteGDB : public BaseRemoteGDB
+ {
+ private:
+ friend void debugger();
+ friend class GDBListener;
+
+ protected:
+ class Event : public PollEvent
+ {
+ protected:
+ RemoteGDB *gdb;
+
+ public:
+ Event(RemoteGDB *g, int fd, int e);
+ void process(int revent);
+ };
+
+ friend class Event;
+ Event *event;
+
+ protected:
+ // Machine memory
+ bool write(Addr addr, size_t size, const char *data);
+
+ public:
+ RemoteGDB(System *system, ThreadContext *context);
+ ~RemoteGDB();
+
+ bool acc(Addr addr, size_t len);
+ int signal(int type);
+
+ protected:
+ void getregs();
+ void setregs();
+
+ void clearSingleStep();
+ void setSingleStep();
+
+ PCEventQueue *getPcEventQueue();
+
+ protected:
+ class HardBreakpoint : public PCEvent
+ {
+ private:
+ RemoteGDB *gdb;
+
+ public:
+ int refcount;
+
+ public:
+ HardBreakpoint(RemoteGDB *_gdb, Addr addr);
+ std::string name() { return gdb->name() + ".hwbkpt"; }
+
+ virtual void process(ThreadContext *tc);
+ };
+ friend class HardBreakpoint;
+
+ typedef std::map<Addr, HardBreakpoint *> break_map_t;
+ typedef break_map_t::iterator break_iter_t;
+ break_map_t hardBreakMap;
+
+ bool insertSoftBreak(Addr addr, size_t len);
+ bool removeSoftBreak(Addr addr, size_t len);
+ bool insertHardBreak(Addr addr, size_t len);
+ bool removeHardBreak(Addr addr, size_t len);
+
+ protected:
+ struct TempBreakpoint {
+ Addr address; // set here
+ MachInst bkpt_inst; // saved instruction at bkpt
+ int init_count; // number of times to skip bkpt
+ int count; // current count
+ };
+
+ TempBreakpoint notTakenBkpt;
+ TempBreakpoint takenBkpt;
+
+ void clearTempBreakpoint(TempBreakpoint &bkpt);
+ void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr);
+ };
+}
+
+#endif /* __ARCH_ALPHA_REMOTE_GDB_H__ */